According to this Netimperative article, online researchers, non-commercial video producers, and mashup specialists in the UK (only) might be interested to learn that the BBC, using the Creative Archives License, has just released nearly 80 video news clips from the BBC News Archive. Access to the material is free.
The clips cover a range of iconic moments in modern history, including 9/11, the fall of the Berlin Wall and crowds ejecting soldiers from Beijing's Tiananmen Square.
You can browse a complete list of clips here.
The BBC says that more video will be available in the future. The video can be downloaded in QuickTime, Windows Media, MPEG1 and MP3 formats and can be downloaded at the BBC Open News Archive where you can also learn more.